With a rich history in coal mining, Cardiff has since evolved into a tech hub. As well as castles and being the birthplace of Roald Dahl, the Welsh capital has a bourgeoning technology sector in areas such as medicine, banking and climate solutions.
We’ll be introducing you to five of the companies you should be on the lookout for.
Antiverse
Founded: 2017
Sector: Medtech
Antiverse designs antibodies through machine learning, including g-protein coupled receptors and ion channels, with the ability to produce an antibody within six months. The company is headquartered in Cardiff and has offices in Boston, USA.
In its latest Series A funding round in March 2026, Antiverse raised around £7 million ($9.3 million). This makes their total investment to date around $20 million (around £15 million).
Burbank
Founded: 2021
Sector: Banking
Burbank promises to enable consumer authentication anywhere by using a tap and PIN system, making authentication simpler and more widely available. It’s the only available card-present online payment system.
In March 2025, Burbank raised £5 million through its first and only seed round.
Bloemteknik
Founded: 2023
Sector: Climatetech
Bloemteknik is a vertical farming business to help tackle the emerging global food crisis. It offers various vertical farming and greenhouse solutions for different plant growing needs.
The company has raised around £3.2 million in funding, including £2.5 million from Foresight Group in January 2026. It also secured £700,000 in funding from Innovate UK in February 2026.
Nisien.ai
Founded: 2023
Sector: Cybersecurity
The word ‘Nisien’ comes from Welsh folklore. In the Mabinogion, one twin brother, Efnisien, spreads hate and conflict, while the other (Nisien) spreads peace and reconciliation. That’s what they want to emulate in online communities, by reducing online threats and encouraging respectful dialogue while protecting freedom of expression.
Niesen has only had one funding round, but has raised $1 million (around £740,000), according to PitchBook. Other sources say that the figure is undisclosed.
EyeDP
Founded: 2025
Sector: AI
EyeDP uses AI to make document verification more efficient. It automates the processing, automation and validation of these documents in real-time. It can pick up fraud, errors and give you a summary of what’s in the document. On top of that, it has suggestions on how to improve it.
As a relatively young business, there have been no funding rounds for EyeDP yet, but watch this space.
More tech companies in UK cities
6 of the most exciting tech companies in Edinburgh – This time we’re off to bonnie Scotland to discover some of the most exciting technology companies in the country’s capital, Edinburgh
5 of the most exciting tech companies in Birmingham – Read on to find out about the most exciting tech companies in Birmingham and why it’s a great place to do business
9 of the most exciting tech companies in Belfast – Belfast is one to watch when it comes to tech businesses. Here are nine companies based in the city that will pique your interest
Six of the most exciting tech companies in Leeds – In recent years, Leeds has found itself becoming the home of some of the country’s most exciting startups and a hub for a tech industry that includes healthtech, data, AI and more
12 of the most exciting tech companies in Bristol – Bristol and Bath’s tech sector is one of the fastest growing in the UK and a hotspot for cleantechs. Here are some of the most exciting startups to keep an eye on
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